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Model A1419 / EMC 2806 / Late 2014 or Mid 2015. 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (ID iMac15,1); EMC 2834 late 2015 / 3.3 or 3.5 GHz Core i5 or 4.0 GHz Core i7 (iMac17,1) All with Retina 5K displays

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I changed display on iMac and its too slow and fan loud

Hallo i have a problem with imac my fan is working on 100% and my pc is horrible slow and i cant do nothing? do you have some helpfull things for me

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Did you transfer the LCD thermal sensor? Sounds like your system is in CPU Safe Mode. Thats when the SMC looses access to one or more sensors and cranks the fan up and lowers the CPU’s clocking so the CPU (system) doesn’t overheat. Review this guide Step 24 iMac Intel 27" Retina 5K Display Display Replacement

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Tomáš Sedliak will be eternally grateful.
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